[Twittervision is] a hypnotic glimpse into the lives of people around the world. [It's] a complete waste of time -- in the same way that conversation, casual sex, and reading are wastes of time.
Nat Torkington of O'Reilly quoted in Is Twitter Here to Stay? in the MIT Technology Review back in April.
So there's the sex part.
Re death: How soon before our online profiles allow us to identify our next-of-kin -- so that in the event of death someone has the option to logon and let the world know that we won't be posting anymore?